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Mezclas no azeotropicas que contienen difluormetano y 1,1,1,2-tetrafluoretano y sus aplicaciones como fluidos frigorificos en el acondicionamiento del aire.
BAIJER, RAYMOND A.(Ed). SociaZ Indicators. MIT Press, Cambridge, Mass., 1966. BERELSON, BERNARD and STEINER, GARY A. Human Behavior. Harcourt, Brace & World